10.8.3 High Condenser Pressure
This alarm is generated in case the Condensing saturated temperature rise above the Maximum condensing saturated
temperature and the control is not able to compensate to this condition. The maximum condenser saturated temperature
is 68.5°C but it can decrease when the evaporator saturated temperature become negative.
In case units operating at high condenser water temperature and with HT option, if the Condensing saturated
temperature exceeds the Maximum condenser saturated temperature, the circuit is only switched off without any
notification on the screen as this condition is considered acceptable in this range of operation.
Circuit status is Off.
The compressor does not load
anymore or even unload, circuit is
stopped.
Bell icon is moving on controller’s
display. String in the alarm list:
CxCmp1 OffCndPressHi
String in the alarm log:
CxCmp1 OffCndPressHi
String in the alarm snapshot
CxCmp1 OffCndPressHi
One or more condenser fans do not
operate properly (Condenserless
units).
Check if fans protections have been
activated.
Check that the fans can turn freely.
Check that there is not any obstacle
to the free ejection of the air blown.
Condenser pump may not be
operating correctly.
Check if the pump can run and give
the required water flow.
Dirty or partially blocked condenser
coil (Condenserless units).
Remove any obstacle;
Clean the condenser coil using soft
brush and blower.
Dirty condenser heat exchanger.
Clean the condenser heat exchanger.
Inlet air temperature of the condenser
is too high (Condenserless units).
The air temperature measured at the
inlet of the condenser may not
exceed the limit indicated in the
operational range (working envelope)
of the chiller.
Check the location where the unit is
installed and check that there are no
any short circuit of the hot-air blown
from the fans of the same unit, or
even from fans of next chillers
(Check IOM for proper installation).
Entering water temperature at
condenser is too high.
Check the cooling tower operation
and settings.
Check the three way valve operation
and settings.
One or more condenser fan turning in
wrong direction (Condenserless
units).
Check for correct phases sequence
(L1, L2, L3) in the electrical
connection of the fans.
Excessive charge of
refrigerant into the unit.
Check liquid sub-cooling and suction
super-heat to control indirectly the
correct charge of refrigerant.
If necessary recover all the
refrigerant to weight the entire charge
and to control if the value is in line
with kg indication on unit label.
Condensing pressure transducer
could not operate properly.
Check for proper operation of the high
pressure sensor.
Wrong unit configuration.
Check that the unit has been
configured for high condenser
temperature applications.
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